Now, I'll write this part of the review without reading the lyrics:
First of all, let's address the obvious: This looks simply beautiful. It's visually gorgeous, even though it's portraying some really extreme imagery using only red, black and white, it's strangely pleasing to the eye.
However, I don't really get what the visuals mean or what they're trying to portray. My initial interpretation is...this is some kind of hell or limbo, full of creatures trying to climb out of it. It's a very sexual place (as evidenced by the tengu inserting his nose into the glory hole and the balls that resemble both anal beads and a gag ball during one specific scene), but also an extremely violent one (as evidenced by...you know, the rest).
The music I don't really enjoy, but it doesn't matter, since it fits the visuals to a tee.
Not much else I can say about it. It's beautiful, it's weird, it's entertaining, it's fucked up without being cringeworthy or making me think "god, why is this garbage a thing?", it's the kinda good shit I want out of animation. Great work.
And now, I'll actually read the lyrics:
Well that doesn't really...change anything for me. Hell, I don't think I understand the lyrics.
Anyway, let's go back to scoring. 5/5.